def validate_switch():
"""
If /rest/v1/switches is cached, perform some validations on it.
-- verify that the announced interfaces names are case insensitive
-- verify the names only appear once
"""
def duplicate_port(entry, name):
dpid = entry['dpid']
print 'Warning: switch %s duplicate interface names: %s' % (dpid, name)
if sdnsh.debug_backtrace:
for port in entry['ports']:
if port['name'] == name:
print 'SWTICH %s:%s PORT %s' % (entry, name, port)
def not_case_sensitive(entry, name):
dpid = entry['dpid']
ports = {}
for port in entry['ports']:
if port['name'].lower() == name:
ports[port['name']] = port
print 'Warning: switch %s case insentive interface names: %s' % \
(dpid, ' - '.join(ports.keys()))
if sdnsh.debug_backtrace:
for port in ports:
print 'SWTICH %s PORT %s' % (dpid, port)
url = "http://%s/rest/v1/switches" % sdnsh.controller
entries = url_cache.get_cached_url(url)
if entries:
for entry in entries:
dpid = entry['dpid']
# verify that the port names are unique even when case
# sensitive
all_names = [p['name'] for p in entry['ports']]
one_case_names = utif.unique_list_from_list([x.lower() for x in all_names])
if len(all_names) != len(one_case_names):
# Something is rotten, find out what.
for (i, port_name) in enumerate(all_names):
# use enumerate to drive upper-triangle comparison
for other_name in all_names[i+1:]:
if port_name == other_name:
duplicate_port(entry, port_name)
elif port_name.lower() == other_name.lower():
not_case_sensitive(entry, port_name)
def validate_switch():
"""
If /rest/v1/switches is cached, perform some validations on it.
-- verify that the announced interfaces names are case insensitive
-- verify the names only appear once
"""
def duplicate_port(entry, name):
dpid = entry['dpid']
print 'Warning: switch %s duplicate interface names: %s' % (dpid, name)
if sdnsh.debug_backtrace:
for port in entry['ports']:
if port['name'] == name:
print 'SWTICH %s:%s PORT %s' % (entry, name, port)
def not_case_sensitive(entry, name):
dpid = entry['dpid']
ports = {}
for port in entry['ports']:
if port['name'].lower() == name:
ports[port['name']] = port
print 'Warning: switch %s case insentive interface names: %s' % \
(dpid, ' - '.join(ports.keys()))
if sdnsh.debug_backtrace:
for port in ports:
print 'SWTICH %s PORT %s' % (dpid, port)
url = "http://%s/rest/v1/switches" % sdnsh.controller
entries = url_cache.get_cached_url(url)
if entries:
for entry in entries:
dpid = entry['dpid']
# verify that the port names are unique even when case
# sensitive
all_names = [p['name'] for p in entry['ports']]
one_case_names = utif.unique_list_from_list([x.lower() for x in all_names])
if len(all_names) != len(one_case_names):
# Something is rotten, find out what.
for (i, port_name) in enumerate(all_names):
# use enumerate to drive upper-triangle comparison
for other_name in all_names[i+1:]:
if port_name == other_name:
duplicate_port(entry, port_name)
elif port_name.lower() == other_name.lower():
not_case_sensitive(entry, port_name)
def interface_ranges(names):
"""
Given a list of interfaces (strings), in any order, with a numeric suffix,
collect together the prefix components, and create ranges with
adjacent numeric interfaces, so that a large collection of names
becomes easier to read. At the worst, the list will be as
complicated as the original (which would typically be very unlikely)
Example: names <- ['Eth0', 'Eth1', 'Eth2', 'Eth4', 'Eth5', 'Eth8']
result <- ['Eth0-2', 'Eth4-5', 'Eth8']
names <- ['1','2','3']
result <- ['1-3']
"""
# collect the interfaces into dictionaries based on prefixes
# ahead of groups of digits.
groups = {}
def is_digit(c):
c_ord = ord(c)
if c_ord >= ord('0') and c_ord <= ord('9'):
return True
return False
for name in names:
if is_digit(name[-1]):
for index in range(-2, -len(name) - 1, -1):
if not is_digit(name[index]):
index += 1
break
else:
index = -len(name)
prefix = name[:index]
number = int(name[index:])
if not prefix in groups:
groups[prefix] = []
groups[prefix].append(number)
else:
groups[name] = []
for prefix in groups:
groups[prefix] = sorted(utif.unique_list_from_list(groups[prefix]))
ranges = []
for (prefix, value) in groups.items():
if len(value) == 0:
ranges.append(prefix)
else:
low = value[0]
prev = low
for next in value[1:] + [value[-1] + 2]: # +[] flushes last item
if next > prev + 1:
if prev == low:
ranges.append('%s%s' % (prefix, low))
else:
ranges.append('%s%s-%s' % (prefix, low, prev))
low = next
prev = next
return ranges
def format_table(self, data_list, display_format = None, field_ordering="default"):
"""
Takes in list of dicts and generates nice table, e.g.
id slice_id MAC Address ip Switch ID
------------------------------------------------
1 1 00:00:00:00:01:03 10013 150861407404
2 2 00:00:00:00:01:01 10011 150861407404
3 1 00:00:00:00:02:03 10023 150866955514
@param data_list - a list of dicts
@param format describes the format of the output table to display
@param field_ordering is the field_ordering identifier in the model,
there can be multiple ("default", "brief", "detailed")
"""
#
# first, determine a list of fields to be printed, then using that list,
# determine the fields width of each field, including calling any formatting
# function, then format the result
#
# during the format computation, replace the value with the 'formatted value'
# to prevent multiple calls to the same formatting funcition
#
if not data_list or not type(data_list) == list:
if type(data_list) == dict and "error_type" in data_list:
return data_list.get("description", "Internal error")
return "None."
format_info = self.table_info.get(display_format, None)
if self.sdnsh.description:
if format_info == None:
print 'format_table: missing format %s' % display_format
else:
format_from = format_info.get('self', '')
print 'format_table: %s %s %d entries' % (
display_format, format_from, len(data_list))
field_widths = {}
field_headers = {}
fields_to_print = []
#
# do the 'figur'n for which fields will get printed.
#
# to determine the length, call the formatting function, and replace the
# value for that field with the updated value; then 'cypher the length.
#
# note that field_widths.keys() are all the possible fields
# check if the headers makes any field wider and set fields_to_print
#
if format_info:
if 'field-orderings' in format_info:
fields_to_print = format_info['field-orderings'].get(field_ordering, [])
if len(fields_to_print) == 0: # either no field_orderings or couldn't find specific
fields_to_print = format_info['fields'].keys()
for f in fields_to_print:
header = self.get_header_for_field(format_info, f)
field_headers[f] = header
field_widths[f] = max(len(header), field_widths.get(f, 0))
# LOOK! not done now... add in extra fields discovered in data_list if desired
# right now, fields_to_print is a projection on the data
else:
# get fields_to_print from the field names in data_list,
# which is (intended to be) a list of dictionaries
all_fields = utif.unique_list_from_list(sum([x.keys()
for x in data_list], []))
fields_to_print = sorted(all_fields)
if self.sdnsh.description:
print 'format_table: field order "%s" fields %s' % \
(field_ordering, fields_to_print)
#
# generate a fields_to_print ordered list with field_widths for each
# by going through all data and then using field_ordering if avail.
#
row_index = 0
for row in data_list:
row_index += 1
if not 'Idx' in row:
row['Idx'] = row_index
for key in fields_to_print:
#for (k,v) in row.items():
if format_info:
# don't worry about header here - do that soon below
info = self.get_field_info(format_info, key)
if info and info.get('formatter'):
row[key] = str(info['formatter'](row.get(key, ''), row))
w = len(row[key])
else:
w = len(str(row.get(key, '')))
else:
field_headers[key] = self.format_as_header(key)
w = max(len(str(row[key])), len(field_headers[key]))
field_widths[key] = max(w, field_widths.get(key, 0))
#
# generate the format_str and header lines based on fields_to_print
#
format_str_per_field = []
for f in fields_to_print:
format_str_per_field.append("%%(%s)-%ds" % (f, field_widths[f]))
row_format_str = " ".join(format_str_per_field) + "\n"
#
# finally print! only caveat is to handle sparse data with a blank_dict
# let result be a list, and append new strings to generate the final result,
# (for better python performance)
#
result= []
result.append(" ".join(format_str_per_field) % field_headers + "\n")
result.append("|".join(["-"*field_widths[f] for f in fields_to_print]) + "\n") # I <3 python too
blank_dict = dict([(f,"") for f in fields_to_print])
for row in data_list:
result.append(row_format_str % dict(blank_dict, **row))
return ''.join(result)
def interface_ranges(names):
"""
Given a list of interfaces (strings), in any order, with a numeric suffix,
collect together the prefix components, and create ranges with
adjacent numeric interfaces, so that a large collection of names
becomes easier to read. At the worst, the list will be as
complicated as the original (which would typically be very unlikely)
Example: names <- ['Eth0', 'Eth1', 'Eth2', 'Eth4', 'Eth5', 'Eth8']
result <- ['Eth0-2', 'Eth4-5', 'Eth8']
names <- ['1','2','3']
result <- ['1-3']
"""
# collect the interfaces into dictionaries based on prefixes
# ahead of groups of digits.
groups = {}
def is_digit(c):
c_ord = ord(c)
if c_ord >= ord('0') and c_ord <= ord('9'):
return True
return False
for name in names:
if is_digit(name[-1]):
for index in range(-2, -len(name)-1, -1):
if not is_digit(name[index]):
index += 1
break;
else:
index = -len(name)
prefix = name[:index]
number = int(name[index:])
if not prefix in groups:
groups[prefix] = []
groups[prefix].append(number)
else:
groups[name] = []
for prefix in groups:
groups[prefix] = sorted(utif.unique_list_from_list(groups[prefix]))
ranges = []
for (prefix, value) in groups.items():
if len(value) == 0:
ranges.append(prefix)
else:
low = value[0]
prev = low
for next in value[1:] + [value[-1] + 2]: # +[] flushes last item
if next > prev + 1:
if prev == low:
ranges.append('%s%s' % (prefix, low))
else:
ranges.append('%s%s-%s' % (prefix, low, prev))
low = next
prev = next
return ranges
